Last winter brought brutal subzero temperatures and dangerously cold wind chills. Grade school classes were canceled throughout Minnesota multiple times during the 2013-2014 school year.

The latest edition, which officially goes on sale this week, forecasts colder-than-normal and wetter-than-usual weather for three-quarters of the country east of the Rocky Mountains. Drought-stricken California, along with the Pacific Northwest, will see normal precipitation and cool temperatures this winter, the almanac said.

The publication, not to be confused with the New Hampshire-based Old Farmer’s Almanac, uses a secret formula based on sunspots, planetary positions and lunar cycles for its long-range weather forecasts.

Modern science doesn’t put much stock in the formula.

But even modern meteorologists can stumble on long-term forecasts. The national Climate Prediction Center forecast a strong likelihood of above-normal temperatures from last November through January.

“Not one of our better forecasts,” Mike Halpert, the Climate Prediction Center’s acting director, said at the time. There’s still no good explanation as to why the polar vortex moved so deep into the U.S., he said.

Of the Farmers’ Almanac, he said, “Good for them if they got it right last year, and I’ll leave it at that.”

The almanac’s editor, Peter Geiger, can also gloat over his Super Bowl forecast. The almanac forecast a snowstorm Feb. 1-3 in New Jersey. It was 49 degrees at the start of the Super Bowl on Feb. 2, but a snowstorm created havoc the following morning.

The almanac wasn’t spot on everywhere: The Pacific Northwest was wetter than expected, and California and the Southwest were drier than projected.

The almanac also contains gardening tips, trivia, jokes and natural remedies, like catnip as a pain reliever or elderberry syrup as an immune booster, in this year’s edition.

But it’s the weather prognostications that tend to grab headlines.

The editors encourage readers to be prepared — and to make the best of it. “When it snows you have two choices: Shovel or make snow angels,” Duncan quipped.